Drive States

Drive States

This section provides descriptions of the logical and physical drive states.

Logical Drive State Descriptions: The following table provides descriptions of the valid logical drive states.

Drive State	Meaning
Blocked	During a rebuild operation, the ServeRAID controller sets the state of any RAID level-0 logical drives associated with a failed array to the Blocked state; then, it reconstructs the data that was stored in RAID level-1 and RAID level-5 logical drives. After the Rebuild operation completes, you can unblock the RAID level-0 logical drives, and access them once again. However, the logical drive might contain damaged data. You must either re-create, install, or restore the data from the most recent backup disk or tape to the RAID level-0 logical drive.
Critical Migrating	A logical drive in the critical state that is undergoing a logical drive migration (LDM).
Critical System	The ServeRAID controller uses this reserved state during a logical drive migration (LDM).
Critical	A RAID level-1 or level-5 logical drive that contains a defunct physical drive is in the critical state. A critical logical drive is accessible, despite a physical drive failure. -Attention- If the state of the logical drive is critical, replace and rebuild the defunct drive as soon as possible to prevent the loss of data. If a second drive fails before the first rebuild completes, you might lose valuable data. See 'Rebuilding a Defunct Drive' for more information.
Migrating	The logical drive is undergoing a logical drive migration; that is, a change in RAID levels, a change in logical drive size, or an increase in free space.
Offline	The logical drive is offline and not accessible. This state occurs if one or more physical drives in a RAID level-0 logical drive is defunct. This state also occurs when two or more physical drives in a RAID level-1 or level-5 logical drive are defunct.
Okay	The logical drive is okay. It is in a good, functional state.
System	The ServeRAID controller uses this reserved state during logical drive migration (LDM).

If the state of the logical drive is critical you must replace and rebuild the defunct drive.
See 'Rebuilding a Defunct Drive' for more information.

Physical Drive State Descriptions:

The following table provides descriptions of the valid physical drive states.

Drive State	Meaning
Defunct	A physical hard disk drive in the Online, Hot-Spare, or Rebuild state has become defunct. It does not respond to commands, which means that the ServeRAID controller cannot communicate properly with the drive. A hard disk drive in the Defunct state does not necessarily mean that you need to replace the drive. Before you replace the drive, ensure that: 1. All cables are connected properly to the server backplane and to the hard disk drive. Also, check to ensure that all cables inside the server are connected properly. 2. The hot-swap drive trays are seated properly in the drive bay. 3. The termination for each device on the SCSI channel is set properly. 4. Each device on the SCSI channel has its own, unique SCSI ID. If the hard disk drive still does not function after you perform these steps, replace the drive.
Empty	No device is present in the bay.
Hot Spare	A Hot-Spare drive is a hard disk drive that is defined for automatic use when a similar drive fails.
Online	The drive is Online. It is functioning properly and is part of an array.
Rebuilding	The drive is being rebuilt. For more information on rebuilding a drive, refer to 'Rebuilding a Defunct Drive'.
Ready	The ServeRAID controller recognizes a Ready drive as being available for definition.
Standby	A Standby drive is a hard disk drive that the ServeRAID controller has spun down.
Standby	Hot Spare A Standby Hot Spare is a Hot-Spare drive that the ServeRAID controller has spun down. If an Online drive becomes Defunct and no suitable Hot-Spare drive is available, a Standby Hot-Spare drive of the appropriate size automatically spins up, and enters the Rebuild state.